Method of providing an estimate of a location
First Claim
1. A method of providing an estimate of the location of first and second devices which are located near each other and are thus essentially at the same location , the method comprising the steps of:
- obtaining at least one range measurement from the first device to a first reference point and location information with regard to the first reference point;
obtaining at least one range measurement from the second device to a second reference point and location information with regard to the second reference point;
resolving clock errors of the first and second devices; and
calculating an estimate of the location of the devices using both of the range measurements obtained with respect to the first and second devices, wherein at least one range measurement obtained from the second device was obtained with respect to a reference point from which no range measurements were obtained from the first device.
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Accused Products
Abstract
A method of providing an estimate of the location of first and second devices (MS1, MS2) comprising the steps of obtaining at least one range measurement from the first device (MS1) to a known reference point (BS1, GPS SVs); obtaining at least one range measurement from the second device (MS2) to a known reference point (BS1, GPS SVs), the second device (MS2) being located near to the first device (MS1); and calculating an estimate of the location of the devices (MS1, MS2) using range measurements obtained in respect of both the first and second devices (MS1, MS2).
100 Citations
26 Claims
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1. A method of providing an estimate of the location of first and second devices which are located near each other and are thus essentially at the same location , the method comprising the steps of:
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obtaining at least one range measurement from the first device to a first reference point and location information with regard to the first reference point;
obtaining at least one range measurement from the second device to a second reference point and location information with regard to the second reference point;
resolving clock errors of the first and second devices; and
calculating an estimate of the location of the devices using both of the range measurements obtained with respect to the first and second devices, wherein at least one range measurement obtained from the second device was obtained with respect to a reference point from which no range measurements were obtained from the first device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device able to provide an estimate of its location comprising ranging means for obtaining at least one range measurement from the device to a first reference point and location information of the first reference point;
- a receiver for receiving ranging information relating to at least one range measurement from another device, located near the device and thus essentially at the same location, to a second reference point and location information of the second reference point; and
a processor for resolving clock errors of the first and second devices and calculating an estimate of the location of the device using both of the range measurements obtained by its ranging means and from the ranging information, and wherein at least one range measurement obtained from the ranging information was obtained with respect to a reference point to which no range measurements were obtained by the ranging means. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
- a receiver for receiving ranging information relating to at least one range measurement from another device, located near the device and thus essentially at the same location, to a second reference point and location information of the second reference point; and
Specification